22200642 has 40 divisors (see below), whose sum is σ = 50918736. Its totient is φ = 7225848.

The previous prime is 22200641. The next prime is 22200671. The reversal of 22200642 is 24600222.

It is a happy number.

22200642 is a `hidden beast` number, since 2 + 2 + 20 + 0 + 642 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22200641) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5373 + ... + 8559.

Almost surely, 2^22200642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22200642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25459368).

22200642 is an abundant number, since it is smaller than the sum of its proper divisors (28718094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22200642 is a wasteful number, since it uses less digits than its factorization.

22200642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3244 (or 3235 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 22200642 is about 4711.7557237191. The cubic root of 22200642 is about 281.0531849702.

Adding to 22200642 its reverse (24600222), we get a palindrome (46800864).

The spelling of 22200642 in words is "twenty-two million, two hundred thousand, six hundred forty-two".